Saturated lime wall

[Stonehouse]

Hi all

Has anyone experienced a saturated lime wall? We’re lime outside as we removed all the cement and got battered by a storm with 80mph winds and rain. We have very old lime plaster inside but it has been painted over in plastic paint (it was like this when we purchased it) and has plasterboard joining to it.

After the storm, we started to get penetrating damp and now some of it is very significant, yellow and brown. Our gable is S/SW. When I went into the eaves the lime mortar was darker in colour, crumbly and felt damp so the walls must be saturated. It keeps raining and we’re getting more random patches on the walls.

We’ve been advised to seal the wall with a breathable Keim or beeck sp plus.

 

[a twig]

If you are facing extreme weather conditions then it is certainly possible for water to penetrate, a silicate based breathable external finish should certainly help.

The alternative traditional method in these situations is to hang tiles / slates on the external wall, but that’s a bit spendy and not to everyone’s aesthetic taste either.

Usual routine applies as well, go outside in heavy rain and check guttering, downpipes etc all functioning correctly

 

[Stonehouse]

There are a few mixed opinions about the silicate coating and that it could cause damp. Do you think it is ok to use?

It’s very frustrating having removed the cement (didn’t have any problems) to having problems with the lime

Thank you!

 

[a twig]

We used a breathable silicate exterior paint in my local G1 listed stone church as an alternative to limewash, all approved by relevant authorities and seen no issues in 3 years.

 

[a twig]

That was a Keim paint, I haven’t any experience with the beeck product you mentioned

 

[Stonehouse]

Thank you so much we’ve also been recommended the Keim silicate so that’s very useful to know! Thank you